My sister and I have done both, SRT this year in September, and R&C last year in September.
Though we enjoyed both and would do either one again, I liked SRT better.
The food and beverage options at SRT were so delicious! It was tapas style and we both ordered different things so we had plenty to share.
At R&C, the potions are much larger though, so that might influence your decision.
The food at R&C was quite good as well, I just enjoyed the SRT options more.
The views of fireworks were fine at both, a bit off center.
I miss Illuminations…
Bottom line, I would pick the place where the food appeals more to you and your family/friends. The view didn’t really seem better at one or the other.
If you can’t get ADRs for the one you chose, try walking up first thing in the morning the day of the show and asking if there are any reservations available. That worked for us at R&C.